Exhaust and induction system for internal-combustion engines



Sept. 23, 1952 G. J. ALLDAY 2,611,353

EXHAUST AND INDUCTION SYSTEM FOR INTERNAL-COMBUSTION ENGINES Filed June 16, 1949' 2 SHEETS-SHEET l I w Nxf fr-f Il Sept' 23 i952 G. J. ALLDAY 2,611,353

EXHAUST AND 'INDUCTION SYSTEM FOR INTERNAL-COMBUSTION ENGINES Filed June 16, 1949 2 SHEETS-SHEET 2 fz .f5 Y ff f c Eg,

.5@ y l f Patented Sept. 23, 1952 nxnsus'r AND I'NDUCTIoNsYsrEM INTERNAL-COMBUsfrIoN ENGINES 5 .FOR

This invention relates to "exhaust and induce` tion'systems for internalv combustion engines of the kind infwhich the exhaust gasesfare ar-V ranged to heat .the combustible gases by means o faheat exchanger. e

According to this invention, lanexhaifist and induction system Yof thekind referred to 'for an internal" combustion engine, is characterised "in thatl the heat exchanger comprises .twov [intercommunicating closed compartments, jconduits leading from the exhaust valves of the. engine extending throughone Ycompartnient :and open: ing into a second compartment Ywhence they lpass into therst saidfcompartment andl'nallylto exhaust, .and an induction pipe,.lccatedjin" the secondy compartmentvr and .communicating with conduits extending'through the rlrstcompart-l men-tand leading to theinlet valves.

An important feature ofthe invention con;-

sists in that an exhaust conduit opens directly.

into the rst said compartment and is directed into a `hollowlprojection which extends into the induction, pipe within v the second compartment.v The hollow projection-may be conicalin.form and' may be arranged; immediately opposite fthe location where the-,gases enter V`into vthe induc tion'ppe., Y -fi Y,

VAThe intercommunicationbetween thetwo compartnients` may be. by wayof ports formed ina 4 divdingwall between them. l The invention-is particularly applicableto an enginein which-the inlet and exhaustV .passages from thecylinders terminate at ports in the side face of the cylinder head-block-,rin which case a back wall* of `the rst said compart`f ment is provided with'a set of portsrinregister` with theI ports intheoylinder head and` communicating respectively with the inlet and-exe'- haust conduits which extend through that compartment.

The two compartments maybe constructed to form a unit, for examplerthey maybe separately formed and then secured together. f-ft.

The walls ofthe compartmentsv may, be water jacketed. In'the cas'ewhere a th'ermostatically controlled bi-fuel Carburettor is employedv such asl described in application No. 15,19`3/i8 the heat responsive Yelement of thethermostatnmay be `disposed in a cavity formed'in a wallofl one of the chambers, for example, in the second chamber.

I'he following is a description of the invention as applied to a four-cylinder internal cornbustion engine reference being made to the accompanying drawing in which:

-s l claires. (cieca-127 if Figure `1 'is :al perspective sectional elevation and e e VV Figure'2 isa perspective-section through lthe centreof Figurel.

"I hefarra'ngement is suitable for usewithan engine inwhich'the exhaust passages in the cyl-1 inder head for number two and three cylinders join one another at a. port centrally disposed,- while-the' exhaust passages of number one and flour'cylin-dersl are arranged atthe ends off the blockg t. .t

' The inlet passages Vin the cylinder block for number one: and'two cylinders joinfonean'- other at afport inth'e slide of the cylinder head block at af 'position between two of the exhaust ports,` *l while thev passages for .number 4three and fourcyl'inder joinat aport located betweenthe othertwo exhaust ports.l r, Y Ajfsirnilarlyndispo'sed setof ports,v l0, |`,'|`2 13,14 are jarranged in the back wall of an `up. percompartment 9 and vassociz'ited with these ports arethree exhaust conduits/I5, I6 andfll and two` inlet conduits I8,v I9; which extend through the `upper compartmentwand communicate with ports in the bottom wahl!)` thereof. A' lower' compartment 2i is secured b y4 bolts rto the upper, compartment and isforin-ed with ,anI inductionv pipe '2,3 having two '..upwardly'l extend-I ing branches 24125.4 which communicateywith two ports associated withl the ,inletconduits .18' and J l 9. Upwardlyy and, downwardly extending passages v26 andiz'l are formed. at the centre of the inductic'inpipe, the latter communicatingwth a .carburetor and theformer arranged; be-` low'ajport 28 inthe bottom `wall 20 of theupper compartmentbut obscured `from that .part by a conical ,wall "29 Ahaving: a` .llange-llv which, is gripped betweensaid bottoml wall 20 and a ange 3l; on-Ithe. induction `pipe. IThe conical wall pro-l jects f into 'the induction pipe immediately (above the passage 21 and forms la h it, spot for the iniiowing gases.. An exhaust pipegleadsfrom theuconduit I6 andvis directedinto the vconical Wa1129.-v ,I u Intercommunicating' ports 32and 33 between theztwo compartments are arranged inthe bot--` tomfwall-yzll vof the lupper compartmentbetween thecentre exhaustconduit I6 and the -two induction conduits I8 and I9 on either side of'it. Thus the exhaust gases pass downwardly through the conduits l5, I6 and I1 into the lower compartment 2| and then upwardly through said ports 32, 33 into the upper compartment and thence to the exhaust passage 34. Provision is made for attaching the exhaust pipe at either g #the front or rear end, the opposite end being blanked o by a, suitable plate 22.

As indicated above a cavity 36 (see Figure 2) for the heat responsive element 31 of a. thermostat is provided in a wall of the lower compartment. The thermostat controls a valve mechanism 42 of a bi-fuel carburetor shown diagram matically ascomprising two float chambers 3 0, 40, from 'either of which fuel iiows to a jet 4I in the induction system according to the setting of the valve mechanisms under the control of the thermostat. .A

As indicated in Figure 2, the walls of ythe upper compartment may be provided with a water jacket 38.

I claim:

4 the iirst said compartment, and an induction manifold in the second compartment, having branch passages communicating with said inlet conduits in the iirst said compartment.

5. An exhaust and induction system for an internal combustion engine comprising two closed compartments constructed as a unit and having a dividing wall between them with openings therein, exhaust conduits and induction conduits extending through one of said compartments,

, 1which exhaust conduits open into the second 1. An exhaust and induction system for an A, internal combustion engine comprising two closed compartments having a dividing wall between.

them with openings therein, exhaust conduits and induction conduits extending through one of said compartments, which exhaust conduits open into the second compartment and an exhaust outlet communicating with the first said compartment, andaninduction manifold in the second compartment having branch passages communicating Withvsaid inlet conduits in the first said compartment.

having branch passages'communicating,with said inlet conduits in the first said compartment, 'a hollow projectionr on said dividing wall lextending into a" part of the "induction manifold.,and an additional exhaust conduit opening directly into therst compartment'opposite the hollow projection.

`. v3;,"An exhaust 'and induction system for an internal combustion engine comprising two closed compartments having a dividing wall between them with openings therein, exhaust conduits and induction vconduits extending gthrough one" compartment, which exhaust conduits open into the secondv compartment ,and exhaust outlet #communicatin'g'withthe nrst said compartment, an induction manifold in the second compartment having an inlet extending'through alwall of that compartment and having `4branch passages comr'nunicating'with saiddnlet conduits in the rst said compartment; a-holl'ow conical projection extending from the dividing'wall intootheinduction maniioldop'posite Vsaid inletuand an additional exhaust conduit opening dire'ctlyvinto the rst said compartment and directed into the hollowconical projection. f l' i. Anexhaust and` induction system 'for an internal combustion engine comprising two closed compartments having a dividing wall between them with openings therein, exhaust conduits' and compartment and an exhaust outlet communicating with the iirst said compartment, and an induction manifold in the second compartment having branch passages communicating with said inlet conduits in the rst said compartment.

6. An exhaust and induction system for an internalcombustion engine comprising two separately formed closed compartments secured together as a unit and having a dividing wall betweenl them with openings therein, exhaust. conduits and induction conduits extending through one of said compartments, which exhaust conduits open into the second compartment and an exhaust 'outlet communicating with the iirst said compartment. and an induction manifold in the vsecond compartment having branch passages communicating with saidv inlet conduits in the first Said compartment. I i l '1.,An exhaust and induction system for an internal combustion engine comprising two 'closed compartments at leastone4 of which is water jacketed,a dividing wall kbetween the compartments with openings therein, exhaust conduits and induction conduits extending through one of said compartments, which exhaust conduits open into the second compartment and an exhaust outlet communicating with the first said4 compartment, and an induction manifold in the second compartment having branch passages communicating with said inlet conduits in the iirst said compartment.

8. 'An exhaust and induction system for an internal combustion engine comprising two closed compartments at least onel of which is water jacketed, a dividing Iwall between the compartments with openings therein, exhaust conduits and induction conduits extending through one of said. compartments, which exhaust conduits open into' the second compartment and vanvexhaust outlet communicating withthe lrstfsaid compartment, an induction manifold in the second compartment having'v branch passages communieating with said inletconduits in the first said compartmentfand a heat responsiveelement of a thermostat disposed in said water jacket' space and adapted to control valve mechanism of a blfuel .Carburettor associated with the' induction system. 5 l GILBERT JAMES ALLDAY. y

REFERENCES .CITED The following references arev of record in the le of this pate'nttvy l UNITEn sTnrEs PATENTS i Number Name Date 1,160,438 ,Neuteboom et al. Nov. 16, 1915 1,439,146 Chadwick Dec. 19, 1922 Lina-888 Moore Apr. 3, 1934 

